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Bulletin issued at 22:02 HKT 11/Apr/2017

At 10 p.m. at the Hong Kong Observatory the air temperature was 25 degrees Celsius and the relative humidity 93 per cent.

The air temperatures at other places were:

King's Park 25 degrees;
Wong Chuk Hang 25 degrees;
Ta Kwu Ling 24 degrees;
Lau Fau Shan 22 degrees;
Tai Po 25 degrees;
Sha Tin 25 degrees;
Tuen Mun 24 degrees;
Tseung Kwan O 26 degrees;
Sai Kung 25 degrees;
Cheung Chau 24 degrees;
Chek Lap Kok 22 degrees;
Tsing Yi 23 degrees;
Shek Kong 24 degrees;
Tsuen Wan Ho Koon 23 degrees;
Tsuen Wan Shing Mun Valley 23 degrees;
Hong Kong Park 25 degrees;
Shau Kei Wan 26 degrees;
Kowloon City 25 degrees;
Happy Valley 25 degrees;
Wong Tai Sin 26 degrees;
Stanley 25 degrees;
Kwun Tong 26 degrees;
Sham Shui Po 24 degrees;
Kai Tak Runway Park 25 degrees;
Yuen Long Park 24 degrees;
Tai Mei Tuk 25 degrees.

Between 8:45 and 9:45 p.m., the rainfall recorded in various regions were:

Sha Tin 0 to 2 mm;
Kwai Tsing 0 to 2 mm;
Sham Shui Po 1 to 2 mm;
Islands District 0 to 1 mm;
Sai Kung 0 to 1 mm;
Tai Po 0 to 1 mm;
Kowloon City 0 to 1 mm.


Note: The data above is provisional. Only limited data validation has been carried out.


Climatological Information for 11 Apr

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


Local Weather Forecast
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Automatic Regional Weather Forecast in Hong Kong & Pearl River Delta Region

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Bulletin updated at 21:45 HKT 11/Apr/2017

Here is the latest weather bulletin issued by the Hong Kong Observatory.

A trough of low pressure is bringing showers to the coastal areas of Guangdong.

Weather forecast for tonight and tomorrow

Cloudy to overcast with a few showers. Visibility relatively low in some areas overnight. It will become more showery with a few thunderstorms tomorrow. Temperatures will range between 21 and 25 degrees. Moderate southerly winds, becoming fresh east to northeasterly winds.

Outlook : Still some rain on Thursday. Weather improving gradually during the Easter Holiday.


(The above forecast period is valid up to 23:59 HKT tomorrow, 12/04/2017; Regular update at : around 45 minutes past each hour, 16:15 HKT and 23:15 HKT)

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MARINE FORECAST
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Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 21:00 HKT 11/Apr/2017

N0 WARNING.

GENERAL SITUATION AT 110900 UTC:
TROUGH 20N 106E 21N 110E 23N 115E 24N 120E S SLOWLY.

MARINE FORECAST FOR 24 HOURS FROM 111300 UTC:

HONG KONG= S 4-5, BEC NE 6. ISOL SHOWERS AND TS. DOWN TO 1000 M IN MIST PATCHES AT FIRST. SEA 2-3 M. TEMP 21-25 C. =
KWANGTUNG= S TO SW 4-5, BEC NE 6-7. ISOL SHOWERS AND TS. DOWN TO 1000 M IN MIST PATCHES AT FIRST. SEA 2 M, BEC 3-4 M. =
TAIWAN STRAIT= NE 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL NE 2 M. =
BASHI= W TO SW 5-6, BEC NE 6. ISOL SHOWERS AND TS. SEA 2-3 M. =
PRATAS= S TO SW 4-5, BEC NE 6. ISOL SHOWERS AND TS. SEA 2 M, 3 M LATER. =
BALINTANG= W TO SW 4-5, BEC NE 5. ISOL SHOWERS. SEA UP TO 2 M. =
SCARBOROUGH= S 4-5, BEC NE 5. CLD. SEA UP TO 2 M. =
PARACEL= S 4-5, BEC NE 6 IN N. ISOL SHOWERS AND TS IN N. SEA 2 M, BEC 3 M IN N. =
TONKIN= NE 6. ISOL SHOWERS AND TS. SEA 2-3 M. =
DANANG= S 5-6, NE 6 LATER. ISOL SHOWERS AND TS. DOWN TO 1000 M IN MIST PATCHES AT FIRST. SEA 2-3 M. =
NNNN
Abbreviations:
KT, VRB, SLW, FRQ - knot, variable, slow, frequent STNR, QSTNR, C - stationary, quasi-stationary, degrees celsius WKN, INTSF, INTST, NC - weaken, intensify, intensity, no change LGT, ISOL, SCT, OCNL - light, isolated, scattered, occasional CLD, DZ, TS - cloudy, drizzle, thunderstorm

The date and time are specified by a 6-digit number DDHHMM. DD stands for the day of month, HH represents the hour while MM indicates the minute in UTC.


  • Map showing the 10 forecast areas
  • Tidal Information

    • SOUTH CHINA COASTAL WATERS
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    South China Coastal Waters

    Current Weather | Local Weather Forecast | Regional Temperature Forecast in HK
    9-day Weather Forecast | UV Index Forecast | Weather Information for Fishermen

    Bulletin issued at 19:30 HKT 11/Apr/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 7:30 p.m. on 11 April 2017

    Warnings:
    Strong winds in all areas.

    Weather Situation:
    A trough of low pressure is affecting the south China coastal waters.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    South force 4 to 5, becoming northeast force 6.
    Relatively low visibility over some areas overnight. Isolated showers and thunderstorms.
    Moderate seas, becoming rough seas.

    Nan'ao and Shanwei:
    Southwest force 4 to 5, becoming northeast force 6 to 7.
    Isolated showers and thunderstorms.
    Moderate seas, becoming rough seas.

    South of Hong Kong and Shangchuan Dao:
    South to southwest force 4 to 5, becoming northeast force 6.
    Isolated showers and thunderstorms.
    Moderate seas, becoming rough seas.

    Outlook for the next 48 hours
    East to northeasterly winds of force 6, occasionally force 7, becoming east to southeasterly winds of force 5 later. Isolated showers and thunderstorms.

    Latest reports from south China coastal weather stations
    --------------------------------------------------------

    Waglan Island Wind south-southwest force 3
      Visibility 10 Kilometres

    Shantou Wind south force 2
      Visibility 29 Kilometres

    Dongsha Wind south-southwest force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind south force 4

    Macau Wind south force 2
      Visibility 10 Kilometres

    Xisha Wind south force 3
      Visibility 21 Kilometres

  • Explanation of Seas or Sea Waves
  • Explanation of Swells
  • Descriptive Terms of Wind Speeds
  • Visibility Readings in Hong Kong Waters
  • Map showing forecast areas
  • Tidal Information

    • WEATHER FORECAST FOR LOCAL AVIATION
    Traditional Chinese Simplified Chinese

    Weather Forecast for Local Aviation

    Bulletin issued at 17:30 HKT 11/APR/2017
    (Next update at 01:30 HKT 12/APR/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A TROUGH OF LOW PRESSURE IS AFFECTING THE
     COASTAL AREAS OF GUANGDONG.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  200/10 BEC 040/15
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  200/15 BEC 040/20                    27-21
   B.   2000 FT:  220/15 BEC 060/15-20                 22-19
   C.   5000 FT:  240/20                               18
   D.  10000 FT:  270/25                               12
   E.  18000 FT:  270/30                               MS3
   F.  24000 FT:  260/35                               MS14
   G.  30000 FT:  260/40                               MS28
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      CLOUDY TO OVERCAST WITH A FEW SHOWERS AND
      THUNDERSTORMS.  LOCALIZED MIST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1000 FT  SCT 2000 FT  BKN 10000 FT.  TEMPO
      FEW CB 800 FT  SCT 1500 FT  BKN 4000 FT.
   K. VISIBILITY    : 7 KM.  TEMPO 4000 M IN SHOWERS/MIST.
                      TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 17000 FT      10 DEG. C LEVEL(S) : 11000 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS.
                      MOD OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 23 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH EAST TO NORTHEASTERLY WINDS.
     CLOUDY TO OVERCAST WITH OCCASIONAL SHOWERS AND A
     FEW THUNDERSTORMS.  LOCALIZED MIST AT FIRST.=

    ===================================================================
Note: The forecast could be updated before the next issue time 
whenever there is newly expected occurrence or non-occurrence 
of significant weather as described below which may be hazardous 
to aircraft within 100-km radius of Hong Kong:

(a) Change of the tropical cyclone category
(b) Strong, Gale, Storm, and Hurricane force winds
(c) Thunderstorm/CBs
(d) Severe gusts
(e) Severe turbulence
(f) Significant low stratus
(g) Fog or thick haze/sandstorm/duststorm 
    causing significant reduction of visibility
(h) Volcanic ash
(i) Radioactive cloud
===================================================================
    Aviation Weather Observation and Forecast Information for Hong Kong International Airport
    To know more about clouds, please see Commonly observed clouds in Hong Kong.

    sigmet
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    Significant Weather Information (SIGMET)

    The Airport Meteorological Office is responsible for monitoring hazardous weather and phenomena in the atmosphere that may affect the safety of aircraft operations within a designated airspace over the northern part of the South China Sea. Weather forecasters at the Airport Meteorological Office issues SIGMET information when hazardous weather and phenomena in the atmosphere such as thunderstorms, tropical cyclones, turbulence, icing occur or are expected to occur in the airspace.

    The latest significant weather information
    issued by the Hong Kong Observatory at 02:25 HKT on 07 Apr 17

    VHHK SIGMET 1 VALID 061825/062225 VHHH- VHHK HONG KONG FIR SEV ICE FCST WI N2318 E11618 - N2342 E11730 - N2124 E11730 - N1900 E11230 - N2048 E11230 - N2300 E11536 - N2318 E11618 FL150/240 MOV E 10KT WKN=

    Please click here for more about the SIGMET

    Tropical Cyclone Warning
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    Tropical Cyclone Warning

    There is no tropical cyclone warning signal.

    For other tropical cyclone related information, please visit the World Meteorological Organization Web Site - Severe Weather Information Centre.

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    TROPICAL CYCLONE WARNING FOR SHIPPING
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    Tropical Cyclone Warning for Shipping

    There is no tropical cyclone warning for shipping*.




    *Tropical cyclone warnings for shipping are issued by the Hong Kong Observatory for tropical cyclones located within the area bounded by 105E and 125E , 10N and 30N.




    For other tropical cyclone related information, please visit the World Meteorological Organization Web Site - Severe Weather Information Centre.

    YESTERDAY'S WEATHER AND RADIATION LEVEL Skip to main content
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    Yesterday's Weather and Radiation Level

    Bulletin issued at 00:15 HKT 11/Apr/2017 
    HKO Readings & Radiation Level

Yesterday's Weather and Radiation Level:
------------------------------------------------------

Hong Kong Observatory
Maximum Air Temperature                     28.1 C
Minimum Air Temperature                     26.3 C
Grass Minimum Temperature                   24.7 C
Relative Humidity                        78 - 87 Percent
Rainfall                                      Trace 
Total rainfall since 1st January            76.2 mm
Against an average of                      225.6 mm

Other Stations                Min                  Max
King's Park                  26.0 C               27.6 C
Wong Chuk Hang               24.4 C               26.2 C
Ta Kwu Ling                  24.8 C               28.5 C
Lau Fau Shan                 25.7 C               28.8 C
Tai Po                       25.7 C               28.1 C
Sha Tin                      26.2 C               29.1 C
Tuen Mun                     25.3 C               28.4 C
Tseung Kwan O                24.9 C               27.8 C
Sai Kung                     24.3 C               27.8 C
Cheung Chau                  23.4 C               27.4 C
Chek Lap Kok                 26.5 C               29.5 C
Tsing Yi                     25.1 C               27.5 C
Shek Kong                    26.1 C               27.9 C
Tsuen Wan Ho Koon            24.3 C               26.4 C
Tsuen Wan Shing Mun Valley   25.2 C               27.3 C
Hong Kong Park               25.7 C               27.3 C
Shau Kei Wan                 24.1 C               27.8 C
Kowloon City                 25.6 C               27.9 C
Happy Valley                 25.8 C               27.7 C
Wong Tai Sin                 26.0 C               27.6 C
Stanley                      24.5 C               27.1 C
Kwun Tong                    26.0 C               28.3 C
Sham Shui Po                 25.4 C               29.3 C
Kai Tak Runway Park          25.9 C               28.0 C
Yuen Long Park               25.6 C               29.2 C
Tai Mei Tuk               24.5 C               28.0 C

Duration of sunshine (King's Park):              0.2 H
The mean UV index recorded at King's Park yesterday was 0.8,
the UV intensity was Low.
The maximum UV index for yesterday was 2.
Sea surface temperature (Waglan Island):        21.9 C 

Yesterday's (10 Apr 2017) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.08 to
0.14 microsievert per hour.  These are within the normal
range of fluctuation of the background radiation level in
Hong Kong (see Note). The average dose rates measured at the
radiation monitoring stations over various parts of the
territory were as follows :

Station                     Yesterday's average
                            (microsievert/hour)
Ping Chau                           0.08
Tap Mun                             0.08
Kat O                               0.09
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.12
Sha Tau Kok                         0.10
Kwun Tong                           0.12
Sai Wan Ho                          0.09
King's Park                         0.14
Tsim Bei Tsui                       0.13
Cape D'Aguilar                      0.13
Chek Lap Kok                        0.14

Note

      

    1. From readings taken at various locations in Hong Kong during
the period 1987-2016, the background ambient gamma radiation
levels may vary between 0.06 and 0.30 microsievert per hour.

    2. The extent of health effects to a person as a result of
exposure to radiation is expressed by a physical quantity
called equivalent dose, in unit of sievert.  Protective
action may be required if there is an increase in the
ambient gamma dose rate above background such that the total
additional dose is expected to exceed 5000 microsieverts in
a relatively short period of time. For example, a dose of
5000 microsieverts may be reached when the ambient gamma
dose rate is 1000 microsieverts per hour (several thousand
times above background) and lasts for 5 hours.

    3. The readings of ambient gamma radiation level from
instrument are expressed in unit of gray, which is
numerically equal to the gamma dose expressed in sievert.
    Climatological Information for 10 Apr
     2003copy right image | Important notices | Privacy policy Last revision date: <11 Apr 2017> 

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